Lisa jittery screens

From: Chandra Bajpai <>
Date: Tue Dec 31 06:46:01 2002

This happened to my Lisa, after consulting with some Lisa experts found
the fix was really easy. Take the top cover off the Lisa to expose the
Lisa Video Board. You'll see 3 small Pots on top of the video board,
over time the contacts oxide to cause the with the Lisa on
and with a small screw driver, *slightly* adjust each pot to wipe away
the oxidation..return the pot to the original setting.


-----Original Message-----
From: []
On Behalf Of Jeffrey H. Ingber
Sent: Monday, December 30, 2002 8:47 PM
Subject: Lisa jittery screens

I have two different Lisa machines and both have a jittery display (one
1.2AMP PSU, 1 1.8 AMP PSU). I've followed the instructions in the Sun
Rem. guide to adjust the power supply output. This works immediately
after the adjustment, but the problem gradually comes back over time. I
adjusted both machines around the September timeframe and the jitters
have back on both machines. I'd like to get both of these machines in
top-shape so I can have them running at my New Years party =)

Before I go through the adjustment again, is there anything else I
should be checking? I've also tried adjusting the V.Hold, but this
doesn't seem to make a difference. Maybe I'm not using a precise enough

Received on Tue Dec 31 2002 - 06:46:01 GMT

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